| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | keep an [noun] [prep] | 510 |
|
| 2 | [vb mod] keep [noun] [prep] | 99 |
|
| 3 | [vb mod] keep an [noun] | 84 |
|
| 4 | [vb mod] an [noun] [prep] | 28 |
|
